grandbrat
grandkid
oe
grandbairn
grandbaby
grandbabe
grandyoungin
grandson
grandwean
great-grandson
grandboy
nevvy
great-grandkid
catworm
granddaughter
third cousin
skid
great-grandchild
step
stepbairn
stepkid
great-granddaughter
titiwi
bimboy
first cousin twice removed
second cousin once removed
great-great-grandson
trot
bar mitzvah
godson
paddle
grandboomer
first cousin thrice removed
peanut
great grandchild
grandgirl
grandsonship
pooper
babe in arms
young'un
poop factory
nephewly
poop machine
poppet
second cousin
laddie
boy
parental unit
uncle
little